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  • 1
    Keywords: Earth sciences ; Earth Sciences ; Climate change ; Sedimentology ; Oceanography ; Marine sciences ; Freshwater ; Earth sciences ; Climate change ; Sedimentology ; Oceanography ; Marine sciences ; Freshwater
    Description / Table of Contents: From the Contents: Introduction -- History -- Geography -- Physical Oceanography -- Introduction -- Circulation -- Water masses -- Inflow-outflow system -- Air-Sea Interaction -- High frequency variation -- Remote Sensing -- Chemical Oceanography -- Introduction -- Nutrients and dissolved oxygen -- Carbon cycle.
    Type of Medium: Online Resource
    Pages: Online-Ressource (XVI, 460 p. 150 illus., 68 illus. in color, online resource)
    Edition: 1st ed. 2016
    ISBN: 9783319227207
    Series Statement: SpringerLink
    Language: English
    Note: From the Contents: IntroductionHistory -- Geography -- Physical Oceanography -- Introduction -- Circulation -- Water masses -- Inflow-outflow system -- Air-Sea Interaction -- High frequency variation -- Remote Sensing -- Chemical Oceanography -- Introduction -- Nutrients and dissolved oxygen -- Carbon cycle.
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  • 2
    Online Resource
    Online Resource
    Cham :Springer International Publishing AG,
    Keywords: Oceanography. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (467 pages)
    Edition: 1st ed.
    ISBN: 9783319227207
    DDC: 551.461454
    Language: English
    Note: Intro -- Preface -- Contents -- Contributors -- Abbreviations -- 1 General Introduction -- Abstract -- 1.1 Geography and Topography -- 1.2 History of Hydrographic Surveys -- 1.3 CREAMS Program -- 1.3.1 Important Findings Before CREAMS -- 1.3.2 CREAMS Studies -- 1.3.2.1 Important Discovery I: Oceanic Structures -- 1.3.2.2 Important Discovery II: Dramatic Structural Changes in the East Sea -- 1.3.3 Globalization of East Sea Studies -- 1.3.3.1 The Birth of CREAMS-II -- 1.3.3.2 CREAMSPICES EAST (East Asian Seas Time Series)-I Program -- 1.3.3.3 IPCC 4th Report and Nobel Peace Prize, 2007 -- 1.3.4 Concluding Remarks -- 1.4 Recent Observational Programs -- 1.4.1 Surface Drifters -- 1.4.2 Argo (Array for Real-Time Geostrophic Oceanography) -- 1.4.3 Moored Current Observations -- 1.4.4 Satellite Oceanography -- References -- 2 Forcings -- Abstract -- 2.1 Introduction -- 2.2 Surface Wind -- 2.2.1 Accuracy of Satellite Scatterometer Wind Vectors -- 2.2.2 Spatial and Temporal Variability of Near-Surface Winds -- 2.2.3 Wind Stress and Its Curl -- 2.3 Surface Heat Flux -- 2.3.1 Comparison of Heat Flux Estimates -- 2.3.2 Temporal Variations -- 2.3.3 Spatial Distribution -- 2.4 Boundary Flux -- 2.4.1 Korea Strait -- 2.4.2 Tsugaru Strait and Soya Strait -- 2.4.3 Long-Term Variability -- 2.5 Summary and Discussion -- References -- 3 Water Masses and Their Long-Term Variability -- Abstract -- 3.1 Introduction -- 3.2 Sea Surface Temperature and Mixed Layer Depth -- 3.2.1 Sea Surface Temperature -- 3.2.2 Surface Front -- 3.2.3 Mixed Layer Depth -- 3.3 Water Masses -- 3.3.1 Upper Ocean Water Masses -- 3.3.1.1 Tsushima Warm Water -- 3.3.2 Intermediate Waters -- 3.3.2.1 East Sea Intermediate Water -- 3.3.2.2 High Salinity Intermediate Water -- 3.3.2.3 North Korea Cold Water -- 3.3.2.4 Korea Strait Bottom Cold Water -- 3.3.3 Central Water, Deep Water, and Bottom Water. , 3.4 Long-Term Variability of Water Properties -- 3.4.1 Water Masses in Change -- 3.4.2 Interannual and Decadal Variation of the Upper Ocean -- 3.4.2.1 Upper Ocean Temperature -- 3.4.2.2 Sea Surface Height -- 3.5 Summary and Remaining Questions -- References -- 4 Circulation -- Abstract -- 4.1 Introduction -- 4.2 Near-Surface Circulation -- 4.2.1 Mean Surface Current -- 4.2.2 Variability of the Surface Current and the Subpolar Front -- 4.2.3 Coastal Upwelling -- 4.3 Mesoscale Eddies -- 4.3.1 Characteristics of Eddies -- 4.3.2 Evolution of the Ulleung Warm Eddy -- 4.4 Thermohaline Circulation -- 4.4.1 Rates of Water Mass Formation -- 4.4.2 Deep Currents and Circulation -- 4.4.2.1 Mean Currents -- 4.4.2.2 Temporal Variability -- 4.5 Dynamical Aspects -- 4.5.1 How Is the Tsushima Warm Current Driven? -- 4.5.2 How Are the Branches of the Tsushima Warm Current Formed? -- 4.5.3 What Is the Role of Local Forcing? -- 4.5.4 How Is the Deep Layer Circulation Driven? -- 4.6 Numerical Modeling Studies of Circulation -- 4.6.1 Numerical Simulations -- 4.6.2 Data Assimilation and Forecasting Systems -- 4.7 Summary and Discussion -- References -- 5 High-Frequency Variability: Basin-Scale Oscillations and Internal WavesTides -- Abstract -- 5.1 Introduction -- 5.2 Basin-Scale Oscillations -- 5.2.1 Observations -- 5.2.2 Analytic Model and Applications -- 5.3 Surface and Internal Tides -- 5.3.1 Observations -- 5.3.2 Models and Applications -- 5.4 Near-Inertial Oscillations -- 5.4.1 Observations -- 5.4.2 Generation and Propagation of Near-Inertial Waves -- 5.5 Nonlinear Internal Waves -- 5.5.1 Observations -- 5.5.2 Generation and PropagationRefraction of Nonlinear Internal Waves -- 5.6 Conclusion and Remaining Issues -- References -- 6 Dissolved Oxygen and Nutrients -- Abstract -- 6.1 Introduction -- 6.2 Dissolved Oxygen -- 6.2.1 History of DO Measurements. , 6.2.2 Vertical Structure of DO Profile -- 6.2.3 Trend of DO Inventory in the Bottom Layer -- 6.2.4 Projecting DO Inventory in Relation to Climate Change -- 6.3 Nutrients -- 6.3.1 History of Nutrient Studies -- 6.3.2 Spatial and Temporal Distribution of Nutrients -- 6.3.3 Factors Controlling Nutrient Concentrations in the Surface Layer -- 6.3.4 Major Research Topics Involving Nutrients -- 6.4 Summary and Future Challenges -- References -- 7 Natural and Anthropogenic Carbon Cycling -- Abstract -- 7.1 Inorganic Carbon Cycling -- 7.1.1 Introduction -- 7.1.2 Ocean Carbonate Chemistry -- 7.1.3 Methods for Estimation of the Oceanic Anthropogenic CO2 Content -- 7.1.4 Distribution of CO2 Variables (TA, DIC, and pH) -- 7.1.5 Dynamics of Anthropogenic CO -- 7.1.6 Acidification of Seawater and Saturation State of Aragonite and Calcite -- 7.2 Organic Carbon Cycling -- 7.2.1 Introduction -- 7.2.2 Primary Production -- 7.2.3 Particulate Organic Carbon Flux -- 7.2.4 Particulate Organic Carbon Budget in the Water Column -- 7.2.5 Dissolved Organic Carbon Cycling -- 7.3 Summary and Remaining Issues -- References -- 8 Uranium Series Radionuclides -- Abstract -- 8.1 Introduction -- 8.2 Thorium Isotopes -- 8.3 Radium Isotopes -- 8.4 Lead and Polonium Isotopes -- References -- 9 Distribution of Chemical Elements in Sediments -- Abstract -- 9.1 Introduction -- 9.2 Organic and Inorganic Carbon and Silica -- 9.2.1 Distribution of Organic Carbon -- 9.2.2 Distributions of Calcium Carbonate and Silica -- 9.3 Metals -- 9.3.1 Aluminum -- 9.3.2 Iron -- 9.3.3 Manganese and Other Trace Elements -- 9.3.4 Redox Cycling of Manganese and Iron -- 9.3.5 Sources and Geochemical Features of Sediments -- 9.4 Summary -- References -- 10 Phytoplankton and Primary Production -- Abstract -- 10.1 Introduction -- 10.2 Chlorophyll a. , 10.2.1 Spatial and Seasonal Variability Based on SeaWiFS Observations -- 10.2.2 Shipboard Measurements -- 10.2.3 Measurements of Algal Pigments -- 10.3 Distribution of Micro- and Nano-Phytoplankton Abundance and Harmful Algal Blooms -- 10.3.1 Korean Coastal Waters -- 10.3.2 Russian Coastal Waters -- 10.3.3 Japanese Coastal Waters -- 10.3.4 Offshore Waters -- 10.3.5 Harmful Algal Blooms -- 10.4 Distribution of Picophytoplankton -- 10.4.1 Picophytoplankton Abundance -- 10.4.2 Picocyanobacterial Diversity -- 10.5 Species Composition -- 10.6 The Relationship Between Phytoplankton and Environmental Factors -- 10.7 Overview of Primary Production Studies -- References -- 11 Microbial Ecology and Biogeochemical Processes in the Ulleung Basin -- Abstract -- 11.1 Introduction -- 11.2 Microbiological Oceanography -- 11.2.1 Microbiological Parameters Associated with Coastal Upwelling and UWE -- 11.2.2 Role of Bacteria in Biogeochemical Carbon Cycles -- 11.3 Benthic Biogeochemical Processes -- 11.3.1 High Benthic Carbon Oxidation Rates in the Ulleung Basin -- 11.3.2 Major Carbon Oxidation Pathways -- 11.4 Composition of Prokaryotes -- 11.4.1 Composition of Culture-Dependent Prokaryotes -- 11.4.2 Composition of Culture-Independent Prokaryotes -- References -- 12 Zooplankton -- Abstract -- 12.1 Introduction -- 12.2 Species Composition of Mesozooplankton -- 12.2.1 Cnidaria and Mollusca -- 12.2.2 Arthropoda -- 12.2.2.1 Branchiopoda and Ostracoda -- 12.2.2.2 Copepoda -- 12.2.2.3 Malacostraca -- 12.2.3 Chaetognatha -- 12.2.4 Chordata-Tunicata -- 12.3 Abundance Distribution -- 12.3.1 Spatio-Temporal Distributions of Zooplankton Abundance -- 12.3.2 Abundance Distributions of Major Zooplankton Taxa -- 12.3.3 Distribution of Major Zooplankton Taxa in Local Areas -- 12.4 Patterns of Interest and Trophic Role of Microzooplankton -- 12.4.1 Subpolar Front. , 12.4.2 Upwelling Area -- 12.4.3 Korea Strait -- 12.4.4 Diel Vertical Migration -- 12.4.5 Trophic Role of Microzooplankton -- References -- 13 Fish and Fisheries -- Abstract -- 13.1 Introduction -- 13.2 Fish Species and Habitat -- 13.2.1 Species -- 13.2.2 Distribution and Habitat -- 13.3 Fisheries -- 13.3.1 Korean Commercial Fisheries -- 13.3.1.1 Yields -- 13.3.1.2 Types of Fisheries -- 13.3.1.3 Species Composition -- 13.3.1.4 Mean Trophic Level -- 13.3.1.5 Important Fisheries -- 13.3.2 Japanese Commercial Fisheries -- 13.3.3 Climate Change and Its Impacts on Fish and Fisheries -- 13.3.3.1 Capture Fishery in Korean Waters -- 13.3.3.2 Capture Fishery in Japanese Waters -- 13.3.3.3 Aquaculture -- 13.3.3.4 Invasive Species -- 13.3.4 Ecosystem-Based Fisheries Assessment and Management Issues -- 13.4 Suggestions -- References -- 14 Benthic Animals -- Abstract -- 14.1 Introduction -- 14.2 Local Scale Macrofauna Distributions -- 14.2.1 Southwestern Coasts -- 14.2.2 Northwestern Coasts -- 14.2.3 Dokdo (Dok Island) -- 14.3 Large Scale Macrobenthic Fauna Communities -- 14.3.1 Southwestern Shelf Area -- 14.3.2 Southwestern Shelf and Slope Area -- 14.3.3 Western Slope Area -- 14.3.4 North Bathyal and Abyssal Area -- 14.4 Ocean Dumping Areas -- 14.5 Summary and Further Study -- References -- 15 Marine Mammals -- Abstract -- 15.1 Introduction -- 15.2 The Historic Records of Whales in Korean Waters -- 15.3 Marine Mammals -- 15.3.1 Cetacean -- 15.3.1.1 Baleen Whales -- Northern Right Whale (Eubalaena japonica) -- Blue Whale (Balaenoptera musculus) -- Fin Whale (Balaenoptera physalus) -- Minke Whale (Balaenoptera acutorostrata) -- Humpback Whale (Megaptera novaeangliae) -- Gray Whale (Eschrichtius robustus) -- 15.3.1.2 Toothed Whales -- Sperm Whale (Physeter macrocephalus) -- Baird's Beaked Whale (Berardius bairdii) -- Stejneger's Beaked Whale (Mesoplodon stejnegeri). , Killer Whale (Orcinus orca).
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  • 3
    facet.materialart.
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    In:  http://aquaticcommons.org/id/eprint/15126 | 403 | 2014-05-23 00:22:03 | 15126 | United States National Marine Fisheries Service
    Publication Date: 2021-07-03
    Description: The blue crab (Callinectes sapidus) plays an important economic and ecological role in estuaries and coastal habitats from the Gulf of Mexico to the east coast of North America, but demographic assessments are limited by length-based methods. We applied an alternative aging method using biochemical measures of metabolic byproducts (lipofuscins) sequestered in the neural tissue of eyestalks to examine population age structure. From Chesapeake Bay, subsamples of animals collected from the 1998–99 (n=769) and 1999–2000 (n=367) winter dredge surveys were collected and lipofuscin was measured. Modal analysis of the lipofuscin index provided separation into three modes, whereas carapace-width data collected among the same individuals showed two broad modes. Lipofuscin modal analysis indicated that most adults (carapace width 〉120 mm) were 〈2 years old. The results indicate that use of extractable lipofuscin can provide a more accurate and better resolved estimation of demographic structure of blue crab populations in the field than size alone.
    Keywords: Ecology ; Fisheries
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 312-320
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  • 4
    Publication Date: 2024-02-07
    Description: A comprehensive understanding of the deep-sea environment and mining’s likely impacts is necessary to assess whether and under what conditions deep-seabed mining operations comply with the International Seabed Authority’s obligations to prevent ‘serious harm’ and ensure the ‘effective protection of the marine environment from harmful effects’ in accordance with the United Nations Convention on the Law of the Sea. A synthesis of the peer-reviewed literature and consultations with deep-seabed mining stakeholders revealed that, despite an increase in deep-sea research, there are few categories of publicly available scientific knowledge comprehensive enough to enable evidence-based decision-making regarding environmental management, including whether to proceed with mining in regions where exploration contracts have been granted by the International Seabed Authority. Further information on deep-sea environmental baselines and mining impacts is critical for this emerging industry. Closing the scientific gaps related to deep-seabed mining is a monumental task that is essential to fulfilling the overarching obligation to prevent serious harm and ensure effective protection, and will require clear direction, substantial resources, and robust coordination and collaboration. Based on the information gathered, we propose a potential high-level road map of activities that could stimulate a much-needed discussion on the steps that should be taken to close key scientific gaps before any exploitation is considered. These steps include the definition of environmental goals and objectives, the establishment of an international research agenda to generate new deep-sea environmental, biological, and ecological information, and the synthesis of data that already exist.
    Type: Article , PeerReviewed , info:eu-repo/semantics/article
    Format: text
    Format: text
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  • 5
    Publication Date: 2024-02-07
    Description: Abyssal seafloor communities cover more than 60% of Earth’s surface. Despite their great size, abyssal plains extend across modest environmental gradients compared to other marine ecosystems. However, little is known about the patterns and processes regulating biodiversity or potentially delimiting biogeographical boundaries at regional scales in the abyss. Improved macroecological understanding of remote abyssal environments is urgent as threats of widespread anthropogenic disturbance grow in the deep ocean. Here, we use a new, basin-scale dataset to show the existence of clear regional zonation in abyssal communities across the 5,000 km span of the Clarion–Clipperton Zone (northeast Pacific), an area targeted for deep-sea mining. We found two pronounced biogeographic provinces, deep and shallow-abyssal, separated by a transition zone between 4,300 and 4,800 m depth. Surprisingly, species richness was maintained across this boundary by phylum-level taxonomic replacements. These regional transitions are probably related to calcium carbonate saturation boundaries as taxa dependent on calcium carbonate structures, such as shelled molluscs, appear restricted to the shallower province. Our results suggest geochemical and climatic forcing on distributions of abyssal populations over large spatial scales and provide a potential paradigm for deep-sea macroecology, opening a new basis for regional-scale biodiversity research and conservation strategies in Earth’s largest biome.
    Type: Article , PeerReviewed , info:eu-repo/semantics/article
    Format: text
    Format: text
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  • 6
    Publication Date: 2022-07-25
    Description: Egg production, egg viability and fecal pellet production were determined for individual Acartia omorii, which were fed diets of two species of diatoms (Skeletonema costatum and Phaeodactylum tricornutum) and three species of dinoflagellates (Scrippsiella trochoidea, Heterocapsa triquetra and Cochlodinium polykrikoides). Diets were analyzed for fatty acid content as an indicator of food quality. Depending on the diet, egg production of A. omorii varied over time, diminishing with some diets (S. trochoidea, C. polykrikoides, P. tricornutum). This rate of reduction was much more rapid for a diet of C. polykrikoides, which caused egg production to decrease to ca. 2.4 eggs f−1 d−1 in only four days. As for all diets, egg viability was high at the beginning but with the C. polykrikoides and P. tricornutum diets, it rapidly decreased with time. Fecal pellet production also varied with time, depending on the diet. Egg production rate was closely correlated with fecal pellet production. There was no direct relationship between egg viability and egg production rate, but both egg production and viability were affected by the nutritional quality of food. Egg viability was also highly dependent on the composition of fatty acids in the eggs. Egg viability showed positive correlation with the ratio of ω3:ω6 groups among egg fatty acids, and negative correlation with the ratio of 20:5 (n−3) : 22:6 (n−3). While comparing several diets, egg production rate was higher on diets (H. triquetra and S. trochoidea) containing ample amounts of essential fatty acids such as 18:4 (n−3) and 22:6 (n−3). The results suggest that fertility of A. omorii was dependent upon the quality of the food, and dinoflagellate diets, with the exception of C. polykrikoides, were preferable to diatom diets.
    Type: Article , PeerReviewed
    Format: text
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